2210_s24_qp_21
A paper of Computer Science, 2210
Questions:
10
Year:
2024
Paper:
2
Variant:
1
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2
Four descriptions of programming concepts and five programming concepts are shown. Draw one line to link each description to the most appropriate programming concept. Not all programming concepts will be used. Description Programming concept a subroutine that may not return a value function procedure parameter global variable local variable a value that is declared and used within a specific procedure a value that a procedure expects you to supply when it is called a subroutine that will always return a value Write the pseudocode to use a procedure named Average that passes the values 25 and 50 to the procedure. Outline the role of procedures and functions in creating a program that is easier to maintain.
8. Programming  →  8.1. Programming concepts
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4
This pseudocode algorithm is intended to allow, at random, between 1 and 20 values to be entered and totalled. The total and average of the entered values are output at the end of the algorithm. 01 DECLARE Loop : STRING 02 DECLARE Limit : INTEGER 03 DECLARE Value : REAL 04 DECLARE Total : REAL 05 Total 06 Limit ROUND(RANDOM() * 19,0) + 1 07 IF Loop 1 TO Limit 08 OUTPUT "Enter a number" 09 INPUT Loop 10 Total Total * Value 11 NEXT Loop 12 OUTPUT "The total of the numbers entered is ", Total 13 OUTPUT "The average of the numbers entered is ", Total / Limit Identify the line numbers of four errors in the pseudocode and suggest corrections. Error 1 line number Correction Error 2 line number Correction Error 3 line number Correction Error 4 line number Correction Write the pseudocode statement that would output the average calculated in line 13 of the algorithm rounded to one decimal place. Explain how you should alter the original corrected algorithm to make sure that all the numbers entered are between 1 and 500 inclusive. If any numbers fall outside these limits, a replacement value is requested and entered. You do not need to re-write the algorithm.
7. Algorithm design and problem-solving  →  7. Algorithm design and problem-solving
8. Programming  →  8.1. Programming concepts
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6
The flowchart represents an algorithm. INPUT Limit Count 1 No START STOP OUTPUT Numbers[Result] INPUT Numbers[Count] Result Limit DIV 2 + 1 Swap Numbers[Count] Numbers[Count] Numbers[Count + 1] Numbers[Count + 1] Swap Flag True Count Count + 1 IS Count > Limit? Count Count + 1 Flag TRUE Yes No No No Yes Yes Yes Flag False Count 1 IS Numbers[Count] > Numbers[Count + 1]? IS Count > Limit – 1? IS Flag = TRUE? Complete the trace table for the input data: 7, 47, 50, 52, 60, 80, 63, 70 Numbers Limit Count Flag Swap Result OUTPUT Outline the processes involved in the algorithm shown in the flowchart on page 6.
7. Algorithm design and problem-solving  →  7. Algorithm design and problem-solving
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10
The one-dimensional (1D) array Clubs[] is used to store the names of 12 cricket clubs in a local sports league. The two-dimensional (2D) array Statistics[] is used to store, for each cricket club, the number of: • matches won • matches drawn • matches lost. The 1D array Points[] is used to store the total number of points each cricket club has been awarded. The position of any cricket club’s data is the same in all three arrays. For example, the data in index 2 of Statistics[] and index 2 of Points[] belongs to the cricket club in index 2 of Clubs[] The variable Matches stores the number of matches played by each team. Each team plays the same number of matches. Points are awarded for: • a win – 12 points • a draw – 5 points • a loss – 0 points. Write a program that meets the following requirements: • allows the number of matches played to be input and stored, with a maximum of 22 matches • validates the number of matches played • allows the names of the cricket clubs to be input and stored • allows the number of matches won, drawn and lost to be input and stored for each team • validates the number of matches won, drawn or lost against the number of matches played • asks the user to re-enter the number of matches won, drawn or lost if the total does not match the number of matches played • calculates and stores the total number of points for each club • finds the cricket club or clubs with the highest number of points • outputs the name or names of the winning club or clubs, the number of wins and the total number of points awarded. You must use pseudocode or program code and add comments to explain how your code works. You do not need to declare any arrays or variables; you may assume that this has already been done. All inputs and outputs must contain suitable messages.
7. Algorithm design and problem-solving  →  7. Algorithm design and problem-solving
8. Programming  →  8.1. Programming concepts
8. Programming  →  8.2. Arrays
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